[GregGleason]

I am doing 4th-axis milling for the first time (noob alert, and I have only been milling on 3-axis for a year) and I ran into a problem with how to secure the workpiece.

The workpiece is 1.50" OD and 0.75" in length.

Initially I had thought that 1/4" all-thread going through the center would secure it if I place hex nuts on each end.

I was wrong. The bit (1/4" end mill) would sometimes rotate the workpiece when it was milling at the edges.

I now plan to have an integral rod and flange to screw into the workpiece to secure it.

Are there other ways to do this?

Greg

[jalessi]

A machinable expandable collet or a expanding arbor may solve your dilemma.

5C16CDIA

Breakheart Tool Company Products, 8 pc expanding arbor set, 3 pc expanding arbor set, 4 pc expanding arbor set, 5C Collet Stop Set, 5C Expanding Arbors

Jeff...

[GregGleason]

Interesting. Those are something I haven't seen before. I'm checking them out. Thanks.

Greg